/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Gets the delegate that is bound to the owning toolkit's SetCurrentMode function.
[FOnChangeWorkflowMode](API\Plugins\NiagaraEditor\ViewModels\FNiagaraSystemViewModel\FOnChangeWorkflo-) & OnChangeWorkflowMode()